I also have had this HDMI handshake problem with my RS20i, where no audio is heard when you first turn the unit on. I think this is a problem with the RS20i not successfully accomplishing the handshake during its boot sequence. My workaround, rather than rebooting the Datasat every time, is to switch to an analog source prior to turning it off each night. That way, when I power up the RS20i the next day, the source is an analog (non-HDMI) source. After the startup is complete, I switch to my HDMI source (Kaleidescape in my case). It seems to handle the HDMI handshake every time.